研究了拉晶速率对单晶高温合金凝固界面形态、一次臂间距、（γ＋γ＇）共晶和γ＇相析出行为的影响．结果表明，随拉晶速率的增加，凝固界面从平面向胞状、粗枝、细枝转变，一次臂间距先增加然后减小，（γ＋γ＇）共晶增多，γ＇尺寸减小，立方规则性增加．胞状、枝状凝固时，γ＇尺寸出现“双峰”分布．
The effects of withdrawal rate on liquid / solid interface morphology, primary arm spacing,precipitation behaviour of (γ＋γ＇) eutectic and γ＇particles as well as microstructure of single crystal Ni-base superalloy have been investigated.With the increase of the withdrawal rate,the morphology of liguid/ solid interface transforms from planar into cellular, then coarse dendritic and at last fine dendritic. The primary arm spacing first increases and then decreases, the amount of (γ＋γ＇) eutectic increases, the size of γ＇particles decrease and the shape of γ＇precipitates tends to be regular. During cellular and dendritic solidification, double-peak curves of γ＇size distribution are presented. Correspondent: CHENG Guohua, engineer, Department No.5, Central Iron and Steel Research Institute, Ministry of Metallurgical industry, Beijing 100081
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | HigginbothemGJS．MaterSciTechnol,1986 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%